/Engine/Source/Runtime/LiveLinkInterface/Public/ILiveLinkClient.h
Interface for streaming and consuming data from external sources into UE4. A LiveLinkSource, may stream multiple LiveLinkSubject. Pushing and evaluating data can be executed on any thread. The other functions must be executed on the Game Thread. Subject may shared name between sources, but only 1 of those subjects may be enabled.
class ILiveLinkClient : public ILiveLinkClient_Base_DEPRECATED